developed some small video games before being hired to work on the stealth video game Velvet Assassin during 2008 and early 2009. Work on Grappling Hook began after the developer finished work on Velvet Assassin, development of Grappling Hook began in March 2009. The previously created smaller games gave Teister the experience necessary to undertake Grappling Hook. One, a mobile game named Gladiator, provided the animation system used in Grappling Hook. Grappling Hook was inspired by a Half-Life mod called Cold Ice. Teister wanted to build on the "feeling of acceleration and velocity" from Cold Ice with the use of the grappling hook; "I think the spatial puzzles are perfect to encourage the player to explore how the grappling hook can be used." References External links Grappling Hook Website SpeedRunGames homepage 2009 video games First-person shooters Indie video games Linux games MacOS games Puzzle video games Science fiction video games Video games developed in Germany Windows games